TV series example of the word

Vikings Season 1, Episode 8
You have done me the honor of pledging your fealty as earl to me.

Vikings Season 1, Episode 6
I have come to swear to you my allegiance and fealty

Game of Thrones Season 7, Episode 6
"swear fealty to King Joffrey, and prevent any strife

Game of Thrones Season 1, Episode 7
Today I shall accept oaths of fealty

Game of Thrones Season 2, Episode 5
provided he swears me an oath of fealty.